- Manuscripts, Greek1
- Manuscripts, Italian3
- Manuscripts, Latin2
- Manuscripts, Latin (Medieval and modern)16
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- Manuscripts, Renaissance51
- Manuscripts, Scottish1
- Maps1
- Marbled paper bindings1
- Margaret, Queen, consort of James IV, King of Scotland, 1489-15411
- Mary, Queen of Scots, 1542-15872
- Massachusetts--Boston4
- Materia medica1
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- Mathematics2
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- Medicine--Formulae, receipts, prescriptions2
- Mediterranean Sea2
- Mediterranean Sea--Adriatic Sea1